Improvement in mode of fastening artificial teeth



UNITED STATES PATENT OFFICE.

T. YARDLEY BROWN, OF READING, PENNSYLVANIA.

IMPROVEMENT IN MODE OF FASTENING ARTIFICIAL TEETH.

Specification forming part of Letters Patent No. 72,968, dated January 7, 1868.

To all whom it may concern:

Be it known that I, T. YARDLEY BROWN, of the city of Readin g and State of Pennsylvania, have invented a new and Improved Method of Fastening Artificial Teeth to Swaged Plates; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in the mode of attaching artificial teeth to swaged plates by means of a fusible metal or alloy.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation, reference being had to the accompanying drawings, in which- Figure 1 is a sectional view; Fig. 2, a case finished, and Fig. 3, a case in one-half the packing-flask.

After the plate is swaged, as in Figs.2 and 3, and fitted to the mouth, the gage is taken in the usual way for the purpose of giving the length and fullness that the artificial denture requires. The teeth are then arranged according to gage, care being taken that the wax covers only so much of the plates as is to be occupied by the fusible metal or alloy, being the part marked A, extending around and next to the inside of the teeth, as shown in Fig. 2. The case is then inserted in any ordinary packing-flask, the same as for rubberwork, making two small apertures, as shown at b in Fig. 3, one on each side of the back part of the flask. After the flask is opened and all the wax removed, the plate cleansed, holes are punched through the plate over the teeth, as represented in Fig. 3, countersunk on the palatine surface, or a succession of spurs is raised with an engraver or any sharp instrument, or headed pins are inserted through the plate from the palatine surface for the purpose of receiving the fusible metal, and thus fasten the teeth to the plate.

Gates are cut in the plaster from the heels of the plate, as seen at points marked B in Figs. 2 and 3, so as to communicate with the apertures in the flask through which the fusble metal or alloy is poured after the flask has been first thoroughly heated. The flask is then cooled, and the case removed and finish ed.

What I claim asmy invention, and desire to secure by Letters Patent, is'

The attachment of artificial teeth to swaged plates by means of a fusible metal or alloy, as herein described.

'1. YARDLEY BROWN. Witnesses F. R. ScHMUoKER, F. M. BANKS. 

